WO2024227403A1 - 用于控制多联机空调的方法、装置及多联机空调 - Google Patents

用于控制多联机空调的方法、装置及多联机空调 Download PDF

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Publication number
WO2024227403A1
WO2024227403A1 PCT/CN2024/088825 CN2024088825W WO2024227403A1 WO 2024227403 A1 WO2024227403 A1 WO 2024227403A1 CN 2024088825 W CN2024088825 W CN 2024088825W WO 2024227403 A1 WO2024227403 A1 WO 2024227403A1
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WIPO (PCT)
Prior art keywords
indoor unit
temperature difference
total load
range
air conditioner
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Ceased
Application number
PCT/CN2024/088825
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English (en)
French (fr)
Inventor
禚百田
王延山
时斌
程绍江
国德防
王军
高玉辉
吴传硕
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Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Smart Technology R&D Co Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Smart Technology R&D Co Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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Publication of WO2024227403A1 publication Critical patent/WO2024227403A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/50—Air quality properties
    • F24F2110/64—Airborne particle content
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/50—Air quality properties
    • F24F2110/80—Electric charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature

Definitions

  • the present application relates to the technical field of air conditioning, for example, to a method and device for controlling a multi-split air conditioner and a multi-split air conditioner.
  • the method for controlling the capacity of the outdoor unit compressor is usually to set the cooling target low pressure PsTar (or the corresponding saturation temperature PsTempTar) and the heating target high pressure PdTar (or the corresponding saturation temperature PdTempTar), compare the difference between the target value and the actual value, to determine the indoor unit load, and then adjust the compressor frequency to achieve the target pressure.
  • the indoor unit load calculated in the related technology is often not accurate enough, resulting in insufficient sensitivity of the outdoor unit control, which is not conducive to quickly achieving the expected air-conditioning effect.
  • the embodiments of the present application provide a method, an apparatus and a multi-split air conditioner for controlling a multi-split air conditioner to improve the control accuracy of an air conditioner outdoor unit.
  • the method is applied to a multi-split air conditioner including an outdoor unit and multiple indoor units connected to the outdoor unit; the method includes: obtaining the temperature difference between the actual temperature of each indoor unit and the set temperature; determining the single-unit load of the indoor unit corresponding to each temperature difference; determining the total load of the indoor units of the multi-split air conditioner based on the single-unit load of the indoor units; and controlling the operation of the outdoor unit based on the total load of the indoor units.
  • determining the indoor unit load corresponding to each temperature difference includes: determining the temperature at which the temperature difference is located difference range; determine the target corresponding relationship between the indoor unit load and the temperature difference according to the temperature difference range in which the temperature difference is located; based on the target corresponding relationship, determine the indoor unit load corresponding to each temperature difference.
  • the target corresponding relationship between the indoor unit load and the temperature difference is determined, including: when the temperature difference range in which the temperature difference is located is the first temperature difference range, determining the target corresponding relationship as a quadratic curve relationship; when the temperature difference range in which the temperature difference is located is the second temperature difference range, determining the target corresponding relationship as a linear relationship; when the temperature difference range in which the temperature difference is located is the third temperature difference range, determining the target corresponding relationship as a constant value relationship; when the temperature difference range in which the temperature difference is located is the fourth temperature difference range, determining the target corresponding relationship as a linear relationship; wherein the lower limit threshold of the first temperature difference range is greater than or equal to the upper limit threshold of the second temperature difference range, the lower limit threshold of the second temperature difference range is greater than or equal to the upper limit threshold of the third temperature difference range, and the lower limit threshold of the third temperature difference range is greater than or equal to the upper limit threshold of the fourth temperature difference range.
  • determining the target corresponding relationship as a quadratic curve relationship includes: determining a quadratic function according to the square of the temperature difference, the temperature difference, and the indoor unit capacity matching number; and determining the quadratic function as the target corresponding relationship.
  • determining the target correspondence function as a linear relationship includes: determining a linear function according to the temperature difference and the indoor unit capacity matching number; and determining the linear function as the target correspondence.
  • determining the total load of the indoor units of the multi-split air conditioner according to the single load of the indoor unit includes: determining the weight value of the single load of the indoor unit corresponding to each temperature difference; determining the total load of the indoor units according to the single load of the indoor unit and the weight value of the single load of the indoor unit.
  • controlling the operation of the outdoor unit based on the indoor unit total load includes: determining an indoor unit total load range in which the indoor unit total load is located; and adjusting the operation frequency of the outdoor unit according to the indoor unit total load range in which the indoor unit total load is located.
  • the operating frequency of the outdoor unit is adjusted according to the indoor unit total load range of the indoor unit total load, including: when the indoor unit total load range of the indoor unit total load is a first indoor unit total load range, increasing the operating frequency of the outdoor unit; when the indoor unit total load range of the indoor unit total load is a second indoor unit total load range, maintaining the operating frequency of the outdoor unit; when the indoor unit total load range of the indoor unit total load is a third indoor unit total load range, reducing the operating frequency of the outdoor unit; wherein the upper limit threshold of the first indoor unit total load is less than or equal to the lower limit threshold of the second indoor unit total load, and the upper limit threshold of the second indoor unit total load is less than or equal to the lower limit threshold of the third indoor unit total load.
  • the upper threshold of the total load of the first indoor units is equal to the lower threshold of the total load of the second indoor units
  • the upper threshold of the total load of the second indoor units is equal to the lower threshold of the total load of the third indoor units.
  • controlling the operation of the outdoor unit based on the indoor unit total load further includes: when the indoor unit total load range where the indoor unit total load is located is within the second indoor unit total load range, adjusting the expansion valve corresponding to each indoor unit Opening.
  • adjusting the opening of the expansion valve corresponding to each indoor unit includes: determining the temperature difference range of each indoor unit; based on the temperature difference range of each indoor unit, determining a target adjustment strategy corresponding to the temperature difference; and adjusting the expansion valve of the indoor unit according to the target adjustment strategy.
  • determining a target adjustment strategy corresponding to the temperature difference includes: when the temperature difference is less than a first temperature difference threshold, determining the target adjustment strategy to reduce the opening degree; when the temperature difference is greater than or equal to the first temperature difference threshold and less than a second temperature difference threshold, determining the target adjustment strategy to be a maintenance strategy; when the temperature difference is greater than or equal to the second temperature difference threshold, determining the target adjustment strategy to be an automatic adjustment strategy; wherein the first temperature difference threshold is less than the second temperature difference threshold.
  • the speed of reducing the opening degree is adjusted based on the temperature difference, including: if the temperature difference of the indoor unit is less than 3, reducing the opening degree at a first speed; or, if the temperature difference of the indoor unit is between 3-0, reducing the opening degree at a second speed; wherein the first speed is less than the second speed.
  • the device includes: a processor and a memory storing program instructions, wherein the processor is configured to execute the above-mentioned method for controlling a multi-split air conditioner when executing the program instructions.
  • the multi-split air conditioner includes: an outdoor unit; a plurality of indoor units connected to the outdoor unit; and the above-mentioned device for controlling the multi-split air conditioner is installed on the outdoor unit or the indoor unit.
  • the method, device and multi-split air conditioner for controlling a multi-split air conditioner provided in the embodiments of the present application can achieve the following technical effects:
  • the above method provided in the embodiment of the present application determines the single unit load of each indoor unit according to the temperature difference between the actual temperature and the set temperature, and then determines the total unit load of all indoor units, and controls the operation of the outdoor unit based on the total unit load.
  • the temperature difference of each indoor unit can accurately reflect the current state of the indoor unit. Therefore, the single unit load calculated based on the temperature difference is more accurate. Compared with the method of controlling the outdoor unit simply by relying on a pre-set target pressure, the method of the embodiment of the present application can effectively improve the control accuracy of the outdoor unit.
  • FIG1 is a schematic diagram of a hardware environment of a method for controlling a multi-split air conditioner according to an embodiment of the present application
  • FIG2 is a schematic diagram of a method for controlling a multi-split air conditioner provided in an embodiment of the present application
  • FIG3 is a schematic diagram of another method for controlling a multi-split air conditioner provided in an embodiment of the present application.
  • FIG4 is a schematic diagram of another method for controlling a multi-split air conditioner provided in an embodiment of the present application.
  • FIG5 is a schematic diagram of another method for controlling a multi-split air conditioner provided in an embodiment of the present application.
  • FIG6 is a schematic diagram of another method for controlling a multi-split air conditioner provided in an embodiment of the present application.
  • FIG8 is a schematic diagram of a device for controlling a multi-split air conditioner provided in an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a multi-split air conditioner provided in an embodiment of the present application.
  • A/B means: A or B.
  • a and/or B means: A or B, or, A and B.
  • the embodiment of the present application provides a multi-split air conditioner, including an outdoor unit 10 and multiple indoor units 20.
  • the outdoor unit 10 is connected to each indoor unit 20 in communication, and the outdoor unit 10 can obtain the operating status of each indoor unit 20 at any time.
  • the method for controlling the capacity of the outdoor unit compressor is usually to set the cooling target low pressure PsTar (or the corresponding saturation temperature PsTempTar) and the heating target high pressure PdTar (or the corresponding saturation temperature PdTempTar), compare the difference between the target value and the actual value, adjust the compressor frequency, and achieve the target pressure.
  • the calculation of load capacity is based solely on the pre-set target pressure, without considering the actual load demand of each indoor unit.
  • the load demand varies with the installation location, the capacity of the indoor unit, the user's set parameters, etc.
  • the external unit capacity control cannot fully adapt to any application scenario.
  • the embodiment of the present application calculates the load of each indoor unit in a hierarchical manner and adjusts the refrigerant flow rate of the expansion valve of the indoor unit.
  • the outdoor unit has hierarchical control capabilities according to the actual pressure value, which can adapt to different application scenarios, and while quickly improving the air conditioning effect, it is beneficial to the energy saving and control stability of the multi-split air conditioner.
  • a method for controlling a multi-split air conditioner is provided in an embodiment of the present application.
  • the method can be applied to the multi-split air conditioner shown in FIG. 1 .
  • the method includes:
  • S203 Determine the total load of the indoor units of the multi-split air conditioner according to the load of each indoor unit.
  • the above method provided in the embodiment of the present application determines the single unit load of each indoor unit according to the temperature difference between the actual temperature and the set temperature, and then determines the total unit load of all indoor units, and controls the operation of the outdoor unit based on the total unit load.
  • the temperature difference of each indoor unit can accurately reflect the current state of the indoor unit. Therefore, the single unit load calculated based on the temperature difference is more accurate. Compared with the method of controlling the outdoor unit simply by relying on a pre-set target pressure, the method of the embodiment of the present application can effectively improve the control accuracy of the outdoor unit.
  • the method for controlling a multi-split air conditioner can be executed in the multi-split air conditioner system, or in a server that communicates with the multi-split air conditioner system.
  • the solution is described with the processor in the multi-split air conditioner system as the execution subject.
  • the temperature difference is the difference between the indoor ambient temperature and the set temperature during cooling, and is the difference between the set temperature and the indoor ambient temperature during heating.
  • FIG. 3 another method for controlling a multi-split air conditioner provided in an embodiment of the present application is provided.
  • the method can be applied to the multi-split air conditioner shown in FIG. 1 .
  • the method includes:
  • S304 Determine the single-unit load of the indoor unit corresponding to each temperature difference based on the target corresponding relationship.
  • S305 Determine the total load of the indoor units of the multi-split air conditioner according to the load of each indoor unit.
  • the indoor unit load is usually directly calculated based on the temperature difference between the set temperature and the ambient temperature and the product of the indoor unit capacity, but this calculation is too simple and cannot really meet the actual application environment.
  • a target corresponding relationship matching the actual temperature of each indoor unit can be determined based on the actual scenario, and then For multiple indoor units in a multi-split air conditioner, different target correspondence relationships are applied to calculate the indoor unit load of each indoor unit.
  • the indoor unit load result obtained in this application is more accurate, effectively improving the accuracy of external unit control.
  • a method for determining a target correspondence relationship corresponding to an indoor unit is provided in an embodiment of the present application. As shown in FIG. 4 , the method includes:
  • the lower limit threshold of the first temperature difference range is greater than or equal to the upper limit threshold of the second temperature difference range
  • the lower limit threshold of the second temperature difference range is greater than or equal to the upper limit threshold of the third temperature difference range
  • the lower limit threshold of the third temperature difference range is greater than or equal to the upper limit threshold of the fourth temperature difference range.
  • the load and temperature difference are not a simple linear relationship, and there are different curves at different stages.
  • the temperature difference is small, it is generally a linear relationship, but when the temperature difference is large, it is a quadratic curve.
  • Calculating the load in layers is conducive to quickly improving the air conditioning effect when the temperature difference is large.
  • the first temperature difference range to the fourth temperature difference range is a high to low relationship, that is, when the temperature difference is large, it is a quadratic curve, and when the temperature difference is small, it is generally a linear curve.
  • three thresholds can be defined, and then four temperature ranges can be divided. For example, a first threshold, a second threshold, and a third threshold are set, and the size relationship of the three thresholds satisfies: first threshold> second threshold> third threshold.
  • first threshold a first threshold
  • second threshold a second threshold
  • third threshold a third threshold
  • the temperature difference is in the first temperature difference range.
  • the temperature difference is less than or equal to the first threshold, and greater than the second threshold
  • the temperature difference is in the second temperature difference range.
  • the temperature difference is less than or equal to the second threshold, and greater than the third threshold
  • the temperature difference is in the third temperature difference range.
  • the second threshold and the third threshold are set to satisfy the following relationship: second threshold>0>third threshold.
  • the first threshold value may be set to 6°C
  • the second threshold value 1°C
  • the third threshold value -1°C.
  • the above-mentioned determination of the target corresponding relationship as a quadratic curve relationship includes: according to the square of the temperature difference, the temperature difference and The indoor unit capacity number determines a quadratic function; the quadratic function is determined as a target corresponding relationship.
  • IUHP is the indoor unit capacity
  • Each calculation coefficient can be modified according to the laboratory test operation effect, and the embodiment of the present application is not limited to this.
  • determining the target correspondence function as a linear relationship includes: determining a linear function according to the temperature difference and the indoor unit capacity matching number; and determining the linear function as the target correspondence.
  • IUHP is the indoor unit capacity matching number
  • rate4 and rate5 are calculation coefficients, and each calculation coefficient can be corrected according to the laboratory test operation effect, which is not limited in the embodiment of the present application.
  • the first-order linear relationship includes a first first-order linear relationship and a second first-order linear relationship.
  • the calculation coefficients of the first first-order linear relationship and the second first-order linear relationship are different.
  • the target corresponding relationship is determined to be a first linear relationship.
  • the target corresponding relationship is determined to be a second first-order linear relationship.
  • the first linear relationship can be set as:
  • IULoad (rate4*detT+rate5)*IUHP.
  • IULoad (rate6*detT+rate7)*IUHP.
  • determining the total load of the indoor units of the multi-split air conditioner according to the single load of the indoor unit includes: determining the weight value of the single load of the indoor unit corresponding to each temperature difference; determining the total load of the indoor units according to the single load of the indoor unit and the weight value of the single load of the indoor unit.
  • a method for controlling a multi-split air conditioner is provided in an embodiment of the present application.
  • the method can be applied to the multi-split air conditioner shown in FIG1 .
  • the method mainly describes how to control the operation of the outdoor unit according to the total load of the indoor unit.
  • the method includes:
  • S503 Determine the total load of the indoor units of the multi-split air conditioner according to the load of each indoor unit.
  • S505 Adjusting the operating frequency of the outdoor unit according to the indoor unit total load range in which the indoor unit total load is located.
  • the above method provided in this embodiment divides the total load of the indoor unit into multiple ranges, and each range corresponds to a different adjustment method. According to the actual application scenario, the upper and lower thresholds of the adjustment range, and the corresponding adjustment method, precise control of the outdoor unit frequency can be achieved.
  • a method for controlling a multi-split air conditioner is provided in an embodiment of the present application.
  • the method can be applied to the multi-split air conditioner shown in FIG1 .
  • the method includes:
  • S602 Determine the single-unit load of the indoor unit corresponding to each temperature difference.
  • S603 Determine the total load of the indoor units of the multi-split air conditioner according to the load of each indoor unit.
  • S605 Adjust the frequency of the outdoor unit according to the relationship between the actual pressure value and the target pressure value of each indoor unit.
  • S607 Adjust the operating frequency of the outdoor unit according to the indoor unit total load range in which the indoor unit total load is located.
  • the actual pressure value of each indoor unit includes: when the multi-split air conditioner is in cooling mode, the actual pressure value is the actual suction pressure value of the compressor; or, when the multi-split air conditioner is in heating mode, the actual pressure value is the actual exhalation pressure value of the compressor.
  • adjusting the frequency of the outdoor unit according to the relationship between the actual pressure value and the target pressure value of each indoor unit includes:
  • the operating capacity of the outdoor unit is adjusted to reduce the frequency according to the target pressure value.
  • the operation of the outdoor unit is controlled according to the total load of the indoor units.
  • the first pressure threshold is the sum of the target pressure value and threshold 4
  • the second pressure threshold is the difference between the target pressure and threshold 5.
  • the above process can be expressed as follows: when the air conditioner is in cooling mode, if the actual Ps> target Ps+threshold 4: adjust the outdoor unit operation capacity up-frequency according to the target Ps; if the actual Ps ⁇ target Ps-threshold 5: adjust the outdoor unit operation capacity up-frequency according to the target Ps;
  • the target Ps adjusts the operating capacity of the outdoor unit to reduce the frequency, where the target Ps is the target pressure value and the actual Ps is the actual pressure value. In this way, the operating capacity can be increased when the actual pressure value is large, and the operating capacity can be reduced when the actual pressure value is small, further improving the operating efficiency of the outdoor unit.
  • threshold 4 can be set to 0.3 MPa
  • threshold 5 can be set to 0.05 MPa.
  • adjusting the frequency of the outdoor unit according to the relationship between the actual pressure value and the target pressure value of each indoor unit includes:
  • the operating capacity of the outdoor unit is adjusted to reduce the frequency according to the target pressure value.
  • the operation of the outdoor unit is controlled according to the total load of the indoor units.
  • the third pressure threshold is the difference between the target pressure value and the threshold 8
  • the fourth pressure threshold is the sum of the target pressure and the threshold 9 .
  • the above process can be expressed as follows: when the air conditioner is in cooling mode, when the actual Pd ⁇ target Pd - threshold 8: adjust the outdoor unit's operating capacity to increase the frequency according to the target Pd; when the actual Pd > target Pd + threshold 9: adjust the outdoor unit's operating capacity to decrease the frequency according to the target Pd, where the actual Pd is the actual pressure value and the target Pd is the target pressure value.
  • the operating capacity can be increased when the actual pressure value is large, and the operating capacity can be reduced when the actual pressure value is small, further improving the operating efficiency of the outdoor unit.
  • threshold 8 can be set to 0.35 MPa
  • threshold 9 can be set to 0.1 MPa.
  • the operating frequency of the outdoor unit is adjusted according to the indoor unit total load range of the indoor unit total load, including: when the indoor unit total load range of the indoor unit total load is a first indoor unit total load range, increasing the operating frequency of the outdoor unit; when the indoor unit total load range of the indoor unit total load is a second indoor unit total load range, maintaining the operating frequency of the outdoor unit; when the indoor unit total load range of the indoor unit total load is a third indoor unit total load range, reducing the operating frequency of the outdoor unit; wherein the upper limit threshold of the first indoor unit total load is less than or equal to the lower limit threshold of the second indoor unit total load, and the upper limit threshold of the second indoor unit total load is less than or equal to the lower limit threshold of the third indoor unit total load.
  • the total load range of the first indoor unit to the total load range of the third indoor unit changes from small to large, that is, when the total load of the indoor units is small, it means that the capacity of the outdoor unit is insufficient and the capacity of the outdoor unit needs to be increased.
  • the capacity of the indoor units is balanced, in order to achieve energy saving, the current operating capacity is maintained.
  • the load of the indoor units is large, it means that the capacity of the outdoor units is excessive, and the capacity of the outdoor units can be appropriately reduced, for example, by reducing the frequency within a specified time.
  • the upper threshold of the total load of the first indoor units is equal to the lower threshold of the total load of the second indoor units
  • the upper threshold of the total load of the second indoor units is equal to the lower threshold of the total load of the third indoor units.
  • a method for controlling a multi-split air conditioner is provided in an embodiment of the present application.
  • the method can be applied to the multi-split air conditioner shown in FIG. 1 .
  • the method includes:
  • S703 Determine the total load of the indoor units of the multi-split air conditioner according to the load of each indoor unit.
  • S705 Adjust the operating frequency of the outdoor unit according to the indoor unit total load range in which the indoor unit total load is located.
  • the total load range of the indoor units is the second total load range of the indoor units, indicating that the current total load of the indoor units meets the demand and the operation capacity of the outdoor units remains unchanged.
  • the refrigerant is distributed among the indoor units by adjusting the opening of the expansion valves of the indoor units to meet the load requirements of the indoor units.
  • adjusting the opening of the expansion valve corresponding to each indoor unit includes: determining the temperature difference range of each indoor unit; based on the temperature difference range of each indoor unit, determining a target adjustment strategy corresponding to the temperature difference; and adjusting the expansion valve of the indoor unit according to the target adjustment strategy.
  • the target adjustment strategy corresponding to the temperature difference may be determined according to the following method:
  • the opening can be reduced to ensure the effect of other indoor units, that is, to allow more refrigerant to flow to other indoor units. Energy saving is thereby achieved and control efficiency is improved.
  • the temperature difference is in a balanced state, it means that the current load of the indoor unit is in a balanced state and there is no need to change the opening value.
  • the temperature difference is too high, it means that the temperature difference has little effect on the load.
  • the expansion valve needs to be automatically adjusted based on other parameters of the air conditioner. Specifically, it can be based on the indoor unit coil temperature, superheat, etc. In this way, by controlling the opening in levels, precise control of the indoor unit expansion valve is achieved, which not only saves energy, but also prevents invalid control and improves control accuracy.
  • the method for controlling the opening degree of the expansion valve of each indoor unit can be set as follows: (detT represents the temperature Degree difference)
  • Threshold 3 ⁇ detT ⁇ 0 The load demand of this indoor unit has been met. To ensure the performance of other indoor units, the expansion valve opening of this indoor unit is reduced by a fixed value, such as 5 pls per minute.
  • the method further comprises: when the temperature difference is less than a first temperature difference threshold, adjusting a speed at which the opening degree is reduced based on the temperature difference.
  • the speed of reducing the opening degree is adjusted based on the temperature difference, including: if the temperature difference of the indoor unit is less than a threshold value 3, reducing the opening degree at a first speed; or, if the temperature difference of the indoor unit is between a threshold value 3 and 0, reducing the opening degree at a second speed; wherein the first speed is less than the second speed.
  • the first speed can be to reduce the speed according to a fixed value, for example, set to reduce 5pls per minute.
  • PerMAXPLS is the maximum opening of the indoor unit expansion valve adjusted each time, such as 20pls.
  • an embodiment of the present application provides a device 800 for controlling a multi-split air conditioner, including a processor 100 and a memory 101.
  • the device may also include a communication interface 102 and a bus 103.
  • the processor 100, the communication interface 102, and the memory 101 may communicate with each other through the bus 103.
  • the communication interface 102 may be used for information transmission.
  • the processor 100 may call the logic instructions in the memory 101 to execute the method for controlling a multi-split air conditioner described in any of the above embodiments.
  • logic instructions in the memory 101 described above may be implemented in the form of software functional units and when sold or used as independent products, may be stored in a computer-readable storage medium.
  • the memory 101 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions/modules corresponding to the method in the embodiment of the present application.
  • the processor 100 executes the functional application and data processing by running the program instructions/modules stored in the memory 101, that is, the method for controlling the multi-split air conditioner in the above embodiment is implemented.
  • the memory 101 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; and the data storage area may store data created according to the use of the terminal device, etc.
  • the memory 101 may include a high-speed random access memory and may also include a non-volatile memory.
  • a multi-split air conditioner 900 provided for an embodiment of the present application includes: an outdoor unit 901; a plurality of indoor units 902 connected to the outdoor unit; and a device 800 for controlling the multi-split air conditioner as shown in FIG8 , which is installed in the outdoor unit 901 or the indoor unit 902.
  • the installation relationship described here is not limited to placement inside the multi-split air conditioner, but also includes installation connections with other components of the multi-split air conditioner, including but not limited to physical connections, electrical connections, or signal transmission connections, etc.
  • the device 800 for controlling the multi-split air conditioner can be adapted to a feasible multi-split air conditioner, thereby realizing other feasible embodiments.
  • An embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the method for controlling a multi-split air conditioner according to the above embodiment.
  • An embodiment of the present application provides a computer program product, which includes a computer program stored on a computer-readable storage medium, and the computer program includes program instructions.
  • the program instructions When the program instructions are executed by a computer, the computer executes the method for controlling a multi-split air conditioner in the above embodiment.
  • An embodiment of the present disclosure provides a computer program, which, when executed by a computer, enables the computer to implement the above-mentioned method for controlling a multi-split air conditioner.
  • the computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.
  • the technical solution of the embodiment of the present application can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiment of the present application.
  • the aforementioned storage medium may be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes, or a transient storage medium.
  • the term “and/or” as used in this application refers to any and all possible combinations of one or more associated listings.
  • the term “comprise” and its variants “comprises” and/or comprising refer to the stated features, The existence of a whole, step, operation, element, and/or component does not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and/or these groups.
  • the elements defined by the sentence “including a " do not exclude the existence of other identical elements in the process, method or device including the elements.
  • each embodiment may focus on the differences from other embodiments, and the same similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, the relevant parts may refer to the description of the method part.
  • the disclosed methods and products can be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
  • the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
  • each functional unit in the embodiment of the present application may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.
  • each box in the flowchart or block diagram may represent a module, a program segment or a portion of a code, and the module, program segment or a portion of the code contains one or more executable instructions for implementing the specified logical functions.
  • the functions marked in the boxes may also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they may sometimes be executed in the opposite order, which may depend on the functions involved.

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Abstract

本申请涉及空调技术领域，公开一种用于控制多联机空调的方法、装置及多联机空调。该方法根据实际温度和设定温度之间的温差确定出每一个室内机的单机负荷，进而确定出所有室内机的总机负荷，并基于总机负荷控制室外机的运行。每一室内机的温差可以准确反应该室内机的当前状态，因此，基于温差计算得到的单机负荷更加准确，相比于单纯依靠预先设定的目标压力进行室外机控制的方式，本申请实施例的方法可以有效提升室外机的控制精确度。

Description

用于控制多联机空调的方法、装置及多联机空调
本申请基于申请号为202310494312.1、申请日为2023年5月4日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及空调技术领域，例如涉及一种用于控制多联机空调的方法、装置及多联机空调。
背景技术
在多联机系统中，外机压缩机能力控制方法通常是设定制冷目标低压压力PsTar(或对应的饱和温度PsTempTar)和制热目标高压压力PdTar(或对应的饱和温度PdTempTar)，比较目标值和实际值的差异，来确定内机负荷，进而调整压缩机频率，实现目标压力。
在实现本申请实施例的过程中，发现相关技术中至少存在如下问题：
相关技术中计算的内机负荷往往不够准确，导致外机控制不够灵敏，不利于快速达到预期空调效果。
需要说明的是，在上述背景技术部分公开的信息仅用于加强对本申请的背景的理解，因此可以包括不构成对本领域普通技术人员已知的现有技术的信息。
发明内容
为了对披露的实施例的一些方面有基本的理解，下面给出了简单的概括。所述概括不是泛泛评述，也不是要确定关键/重要组成元素或描绘这些实施例的保护范围，而是作为后面的详细说明的序言。
本申请实施例提供了一种用于控制多联机空调的方法、装置及多联机空调，以提高空调外机的控制精度。
在一些实施例中，所述方法应用于多联机空调包括室外机和与室外机连接的多个室内机；方法包括：获得每一室内机的实际温度与设定温度之间的温度差；确定与每一温度差相对应的室内机单机负荷；根据室内机单机负荷确定多联机空调的室内机总机负荷；基于室内机总机负荷控制室外机运行。
可选地，确定与每一温度差相对应的室内机单机负荷，包括：确定温度差所处的温度 差范围；根据温度差所处的温度差范围，确定室内机单机负荷与温度差的目标对应关系；基于目标对应关系，确定与每一温度差相对应的室内机单机负荷。
可选地，根据温度差所处的温度差范围，确定室内机单机负荷与温度差的目标对应关系，包括：在温度差所处的温度差范围为第一温度差范围的情况下，确定目标对应关系为二次曲线关系；在温度差所处的温度差范围为第二温度差范围的情况下，确定目标对应关系为一次线性关系；在温度差所处的温度差范围为第三温度差范围的情况下，确定目标对应关系为定值关系；在温度差所处的温度差范围为第四温度差范围的情况下，确定目标对应关系为一次线性关系；其中，第一温度差范围的下限阈值大于或等于第二温度差范围的上限阈值，第二温度差范围的下限阈值大于或等于第三温度差范围的上限阈值，第三温度差范围的下限阈值大于或等于第四温度差范围的上限阈值。
可选地，确定目标对应关系为二次曲线关系，包括：根据温差的平方、温差以及室内机能力匹数确定二次函数；将二次函数确定为目标对应关系。
可选地，确定目标对应关系函数为一次线性关系，包括：根据温差以及室内机能力匹数确定一次函数；将一次函数确定为目标对应关系。
可选地，根据室内机单机负荷确定多联机空调的室内机总机负荷，包括：确定与每一温度差相对应的室内机单机负荷的权重值；根据室内机单机负荷与室内机单机负荷的权重值，确定室内机总机负荷。
可选地，基于室内机总机负荷控制室外机运行，包括：确定室内机总机负荷所处的室内机总机负荷范围；根据室内机总机负荷所处的室内机总机负荷范围，调节室外机的运转频率。
可选地，根据室内机总机负荷所处的室内机总机负荷范围，调节室外机的运转频率，包括：在室内机总机负荷所处的室内机总机负荷范围为第一室内机总机负荷范围的情况下，提高室外机的运转频率；在室内机总机负荷所处的室内机总机负荷范围为第二室内机总机负荷范围的情况下，维持室外机的运转频率；在室内机总机负荷所处的室内机总机机负荷范围为第三室内机总负荷范围的情况下，降低室外机的运转频率；其中，第一室内机总机负荷的上限阈值小于或者等于第二室内机总机负荷的下限阈值，第二室内机总机负荷的上限阈值小于或者等于第三室内机总机负荷的下限阈值。
可选地，第一室内机总负荷的上限阈值等于第二室内机总负荷的下限阈值，且第二室内机总负荷的上限阈值等于第三室内机总负荷的下限阈值。
可选地，基于室内机总机负荷控制室外机运行，还包括：在室内机总机负荷所处的室内机总机负荷范围为第二室内机总机负荷范围的情况下，调节每一室内机所对应的膨胀阀 开度。
可选地，调节每一室内机所对应的膨胀阀开度，包括：确定每一室内机所处的温度差范围；基于每一室内机的温度差范围，确定与温度差对应的目标调节策略；根据目标调节策略对室内机的膨胀阀进行调节。
可选地，确定与温度差对应的目标调节策略，包括：在温度差小于第一温差阈值的情况下，确定目标调节策略为减小开度；在温度差大于或者等于第一温差阈值，且小于第二温差阈值的情况下，确定目标调节策略为维持策略；在温度差大于或者等于第二温差阈值的情况下，确定目标调节策略为自动调节策略；其中，第一温差阈值小于第二温差阈值。
可选地，还包括：在温度差小于第一温差阈值的情况下，基于温度差调节开度减小的速度。
可选地，基于温度差调节开度减小的速度，包括：如果室内机的温差小于3，按照第一速度减开度；或者，如果室内机的温差在3-0之间，按照第二速度减小开度；其中，第一速度小于第二速度。
在一些实施例中，所述装置包括：处理器和存储有程序指令的存储器，其特征在于，所述处理器被配置为在执行所述程序指令时，执行上述的用于控制多联机空调的方法。
在一些实施例中，所述多联机空调包括：室外机；与室外机连接的多个室内机；上述用于控制多联机空调的装置，被安装于室外机或室内机。
本申请实施例提供的用于控制多联机空调的方法、装置及多联机空调，可以实现以下技术效果：
本申请实施例提供的上述方法，根据实际温度和设定温度之间的温差确定出每一个室内机的单机负荷，进而确定出所有室内机的总机负荷，并基于总机负荷控制室外机的运行。每一室内机的温差可以准确反应该室内机的当前状态，因此，基于温差计算得到的单机负荷更加准确，相比于单纯依靠预先设定的目标压力进行室外机控制的方式，本申请实施例的方法可以有效提升室外机的控制精确度。
以上的总体描述和下文中的描述仅是示例性和解释性的，不用于限制本申请。
附图说明
一个或多个实施例通过与之对应的附图进行示例性说明，这些示例性说明和附图并不构成对实施例的限定，附图中具有相同参考数字标号的元件示为类似的元件，附图不构成比例限制，并且其中：
图1为根据本申请实施例的一种用于控制多联机空调的方法的硬件环境示意图；
图2为本申请实施例提供的一种用于控制多联机空调的方法的示意图；
图3为本申请实施例提供的另一种用于控制多联机空调的方法的示意图；
图4为本申请实施例提供的又一种用于控制多联机空调的方法的示意图；
图5为本申请实施例提供的再一种用于控制多联机空调的方法的示意图；
图6为本申请实施例提供的再一种用于控制多联机空调的方法的示意图；
图7为本申请实施例提供的再一种用于控制多联机空调的方法的示意图；
图8为本申请实施例提供的一种用于控制多联机空调的装置的示意图；
图9为本申请实施例提供的一种多联机空调的示意图。
具体实施方式
为了能够更加详尽地了解本申请实施例的特点与技术内容，下面结合附图对本申请实施例的实现进行详细阐述，所附附图仅供参考说明之用，并非用来限定本申请实施例。在以下的技术描述中，为方便解释起见，通过多个细节以提供对所披露实施例的充分理解。然而，在没有这些细节的情况下，一个或多个实施例仍然可以实施。在其它情况下，为简化附图，熟知的结构和装置可以简化展示。
本申请实施例的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请实施例的实施例。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含。
除非另有说明，术语“多个”表示两个或两个以上。
本申请实施例中，字符“/”表示前后对象是一种“或”的关系。例如，A/B表示：A或B。
术语“和/或”是一种描述对象的关联关系，表示可以存在三种关系。例如，A和/或B，表示：A或B，或，A和B这三种关系。
结合图1所示，本申请实施例提供一种多联机空调，包括一台室外机10和多台室内机20。其中，室外机10和每台室内机20之间通信连接，室外机10可以随时获取每个室内机20的运行状态。
在多联机系统中，外机压缩机能力控制方法通常是设定制冷目标低压压力PsTar(或对应的饱和温度PsTempTar)和制热目标高压压力PdTar(或对应的饱和温度PdTempTar)，比较目标值和实际值的差异，调整压缩机频率，实现目标压力。
计算负荷能力，单纯依靠预先设定的目标压力，并没有考虑各室内机的真正负荷需求。内机在实际运行过程中，受安装位置、内机容量大小、用户设定参数等影响，负荷需求随 时发生改变，外机能力控制并不能完全自适应任何应用场景。
本申请实施例通过分层级计算各个室内机的单机负荷，调整室内机的膨胀阀冷媒流量。外机根据实际压力值，分层次控制能力，能够自适应不同应用场景，在快速提升空调效果的同时，有利于多联机空调的节能和控制稳定性。
结合图2所示，为本申请实施例提供的一种用于控制多联机空调的方法，该方法可以应用于图1所示的多联机空调上，如图2所示，方法包括：
S201：获得每一室内机的实际温度与设定温度之间的温度差。
S202：确定与每一温度差相对应的室内机单机负荷。
S203：根据室内机单机负荷确定多联机空调的室内机总机负荷。
S204：基于室内机总机负荷控制室外机运行。
本申请实施例提供的上述方法，根据实际温度和设定温度之间的温差确定出每一个室内机的单机负荷，进而确定出所有室内机的总机负荷，并基于总机负荷控制室外机的运行。每一室内机的温差可以准确反应该室内机的当前状态，因此，基于温差计算得到的单机负荷更加准确，相比于单纯依靠预先设定的目标压力进行室外机控制的方式，本申请实施例的方法可以有效提升室外机的控制精确度。
可选地，该用于控制多联机空调的方法可以在多联机空调系统中执行，也可以在与多联机空调系统进行通信的服务器中执行。在本申请实施例中，以多联机空调系统中的处理器为执行主体对方案做出说明。
上述温度差在制冷时，为室内环境温度与设定温度的差值，在制热时，为设定温度与室内环境温度的差值。
结合图3所示，为本申请实施例提供的另一种用于控制多联机空调的方法，该方法可以应用于图1所示的多联机空调上，如图3所示，方法包括：
S301：获得每一室内机的实际温度与设定温度之间的温度差。
S302：确定温度差所处的温度差范围；
S303：根据温度差所处的温度差范围，确定室内机单机负荷与温度差的目标对应关系；
S304：基于目标对应关系，确定与每一温度差相对应的室内机单机负荷。
S305：根据室内机单机负荷确定多联机空调的室内机总机负荷。
S306：基于室内机总机负荷控制室外机运行。
相关技术中，室内机负荷通常是直接根据设定温度与环境温度的温差和室内机能力大小乘积计算，但这种计算过于简单，不能真正符合实际应用环境。通过本申请实施例提供的上述方法，可以基于实际场景确定出与每一室内机的实际温度匹配的目标对应关系，进 而在一个多联机空调中的多个内机上，应用不同的目标对应关系计算得到每个内机的内机负荷，相比于现有技术中所有内机适用固定的计算方式确定内机负荷，本申请得到的内机负荷结果更加准确，有效提高了对外机控制的准确度。
结合图4所示，为本申请实施例提供的一种确定室内机对应的目标对应关系的方法，如图4所示，方法包括：
S401：在温度差所处的温度差范围为第一温度差范围的情况下，确定目标对应关系为二次曲线关系；
S402：在温度差所处的温度差范围为第二温度差范围的情况下，确定目标对应关系为一次线性关系；
S403：在温度差所处的温度差范围为第三温度差范围的情况下，确定目标对应关系为定值关系；
S404：在温度差所处的温度差范围为第四温度差范围的情况下，确定目标对应关系为一次线性关系；
其中，第一温度差范围的下限阈值大于或等于第二温度差范围的上限阈值，第二温度差范围的下限阈值大于或等于第三温度差范围的上限阈值，第三温度差范围的下限阈值大于或等于第四温度差范围的上限阈值。
负荷跟温差不是简单的线性关系，在不同的阶段有不同的曲线。在温差较小时一般为线性关系，但温差较大时为二次曲线。分层次计算负荷，有利于在温差较大时快速提高空调效果。第一温度差范围到第四温度差范围是由高到低的关系，即温差较大时，为二次曲线，温差较小时，一般为一次曲线，上述结论是经过大量实际数据的验证和分析后得到的，因此，基于该结论确定的目标对应关系，也更能够计算出准确的单机负荷，进而进一步提升对室外机的控制精度。
具体地，可以定义三个阈值，进而划分出四个温度范围。例如，设定第一阈值、第二阈值和第三阈值，三个阈值的大小关系满足：第一阈值>第二阈值>第三阈值。在温度差大于第一阈值时，确定温度差处于第一温度差范围。在温度差小于或者等于第一阈值，且大于第二阈值时，确定温度差处于第二温度差范围。在温度差小于或者等于第二阈值，且大于第三阈值时，确定温度差处于第三温度差范围。在温度差小于或者等于第三阈值时，确定温度差处于第四温度差范围。
可选地，设定第二阈值与第三阈值之间满足如下关系：第二阈值>0>第三阈值。
优选地，可以设置第一阈值为6℃，第二阈值＝1℃，第三阈值＝-1℃。
可选地，上述确定目标对应关系为二次曲线关系，包括：根据温差的平方、温差以及 室内机能力匹数确定二次函数；将二次函数确定为目标对应关系。
具体地，可以按照如下二次函数计算每个室内机的单机负荷：
IULoad＝(rate1*detT*detT+rate2*detT+rate3)*IUHP
其中，IUHP为室内机能力大小匹数，rate1、rate2、rate3为计算系数，优选地，可以设定rate1＝0.2，rate2＝0.3，rate3＝0.2。各个计算系数可以根据实验室测试运行效果进行修正，本申请实施例对此不进行限定。
可选地，确定目标对应关系函数为一次线性关系，包括：根据温差以及室内机能力匹数确定一次函数；将一次函数确定为目标对应关系。
具体地，可以按照如下一次线性关系计算每个室内机的单机负荷：
IULoad＝(rate4*detT+rate5)*IUHP
其中，IUHP为室内机能力大小匹数，rate4、rate5为计算系数，各个计算系数可以根据实验室测试运行效果进行修正，本申请实施例对此不进行限定。
可选地，一次线性关系包括第一一次线性关系和第二一次线性关系。第一一次线性关系和第二一次线性关系的计算系数不相同。
可选地，在温度差所处的温度差范围为第二温度差范围的情况下，确定目标对应关系为第一一次线性关系。
可选地，在温度差所处的温度差范围为第四温度差范围的情况下，确定目标对应关系为第二一次线性关系。
具体地，可以设定第一一次线性关系为：
IULoad＝(rate4*detT+rate5)*IUHP，优选地，设定rate4＝0.9，rate5＝1.0。
设定第一一次线性关系为：
IULoad＝(rate6*detT+rate7)*IUHP，优选地，设定rate6＝0.8，rate7＝0.6。
可选地，上述步骤S403中，在温度差所处的温度差范围为第三温度差范围的情况下，确定目标对应关系为定值关系，可以具体是：设定IULoad＝0。
可选地，根据室内机单机负荷确定多联机空调的室内机总机负荷，包括：确定与每一温度差相对应的室内机单机负荷的权重值；根据室内机单机负荷与室内机单机负荷的权重值，确定室内机总机负荷。
结合图5所示，为本申请实施例提供的一种用于控制多联机空调的方法，该方法可以应用于图1所示的多联机空调上，该方法主要描述如何根据室内机总机负荷控制室外机运行。如图5所示，方法包括：
S501：获得每一室内机的实际温度与设定温度之间的温度差。
S502：确定与每一温度差相对应的室内机单机负荷。
S503：根据室内机单机负荷确定多联机空调的室内机总机负荷。
S504：确定室内机总机负荷所处的室内机总机负荷范围；
S505：根据室内机总机负荷所处的室内机总机负荷范围，调节室外机的运转频率。
本实施例提供的上述方法，将室内机总机负荷划分为多个范围，每个范围对应的调节方式不同，可以根据实际应用场景，调节范围的上下阈值，以及对应的调节方式，实现对室外机频率的精确控制。
结合图6所示，为本申请实施例提供的一种用于控制多联机空调的方法，该方法可以应用于图1所示的多联机空调上。如图6所示，方法包括：
S601：获得每一室内机的实际温度与设定温度之间的温度差。
S602：确定与每一温度差相对应的室内机单机负荷。
S603：根据室内机单机负荷确定多联机空调的室内机总机负荷。
S604：获取每一室内机的实际压力值；
S605：根据每一室内机的实际压力值和目标压力值的关系，对室外机频率进行调节。
S606：确定室内机总机负荷所处的室内机总机负荷范围；
S607：根据室内机总机负荷所处的室内机总机负荷范围，调节室外机的运转频率。
可选地，每一室内机的实际压力值包括：在多联机空调为制冷模式的情况下，实际压力值为压缩机的实际吸气压力值；或者，在多联机空调为制热模式的情况下，实际压力值为压缩机的实际呼气压力值。
可选地，在多联机空调为制冷模式的情况下，上述实施例中的步骤S605中的，根据每一室内机的实际压力值和目标压力值的关系，对室外机频率进行调节，包括：
在每一室内机的实际压力值大于第一压力阈值的情况下，根据目标压力值调节室外机的运转能力升频；
或者，在每一室内机的实际压力值小于第二压力阈值的情况下，根据目标压力值调节室外机的运转能力降频。
或者，在每一室内机的实际压力值大于或者等于第二压力阈值，且小于或者等于第一压力阈值的情况下，根据室内机总机负荷控制室外机运行。
其中，第一压力阈值为目标压力值与阈值4的和值，第二压力阈值为目标压力和阈值5的差值。
具体地，上述过程可以表示为如下形式：在空调为制冷模式时，如果实际Ps>目标Ps+阈值4时：按照目标Ps调节外机运转能力升频；如果实际Ps<目标Ps-阈值5时：按照目 标Ps调节外机运转能力降频，其中，目标Ps为目标压力值，实际Ps为实际压力值。这样，可以在实际压力值较大的时候，提升运转能力，而在实际压力值较小时，降低运转能力，进一步提升了室外机的运行效率。
优选地，可设定阈值4为0.3MPa，设定阈值5为0.05Mpa。
可选地，在多联机空调为制热模式的情况下，上述实施例中的步骤S605中的，根据每一室内机的实际压力值和目标压力值的关系，对室外机频率进行调节，包括：
在每一室内机的实际压力值小于第三压力阈值的情况下，根据目标压力值调节室外机的运转能力升频；
或者，在每一室内机的实际压力值大于第四压力阈值的情况下，根据目标压力值调节室外机的运转能力降频。
或者，在每一室内机的实际压力值大于或者等于第三压力阈值，且小于或者等于第四压力阈值的情况下，根据室内机总机负荷控制室外机运行。
其中，第三压力阈值为目标压力值与阈值8的差值，第四压力阈值为目标压力和阈值9的和值。
具体地，上述过程可以表示为如下形式：在空调为制冷模式时，实际Pd<目标Pd-阈值8时：按照目标Pd调节外机运转能力升频；在实际Pd>目标Pd+阈值9时：按照目标Pd调节外机运转能力降频，其中，实际Pd为实际压力值，目标Pd为目标压力值。这样，可以在实际压力值较大的时候，提升运转能力，而在实际压力值较小时，降低运转能力，进一步提升了室外机的运行效率。
优选地，可设定阈值8为0.35MPa，设定阈值9为0.1Mpa。
可选地，根据室内机总机负荷所处的室内机总机负荷范围，调节室外机的运转频率，包括：在室内机总机负荷所处的室内机总机负荷范围为第一室内机总机负荷范围的情况下，提高室外机的运转频率；在室内机总机负荷所处的室内机总机负荷范围为第二室内机总机负荷范围的情况下，维持室外机的运转频率；在室内机总机负荷所处的室内机总机负荷范围为第三室内机总负荷范围的情况下，降低室外机的运转频率；其中，第一室内机总机负荷的上限阈值小于或者等于第二室内机总机负荷的下限阈值，第二室内机总机负荷的上限阈值小于或者等于第三室内机总机负荷的下限阈值。
这样，第一室内机总机负荷范围至第三室内机总机负荷范围由小变大，即在室内机总负荷较小时，说明外机能力不足，需要提升外机能力。在室内机能力均衡时，为了实现节能，维持当前运转能力。而在室内机负荷较大时，说明室外机能力过剩，可以适当降低室外机能力，例如，在规定的时间内降低多少频率。通过分层次的室外机控制和调节，能够 使室外机精确控制，提升控制精度。
可选地，第一室内机总负荷的上限阈值等于第二室内机总负荷的下限阈值，且第二室内机总负荷的上限阈值等于第三室内机总负荷的下限阈值。
结合图7所示，为本申请实施例提供的一种用于控制多联机空调的方法，该方法可以应用于图1所示的多联机空调上，如图7所示，方法包括：
S701：获得每一室内机的实际温度与设定温度之间的温度差。
S702：确定与每一温度差相对应的室内机单机负荷。
S703：根据室内机单机负荷确定多联机空调的室内机总机负荷。
S704：确定室内机总机负荷所处的室内机总机负荷范围；
S705：根据室内机总机负荷所处的室内机总机负荷范围，调节室外机的运转频率。
S706：在室内机总机负荷所处的室内机总机负荷范围为第二室内机总机负荷范围的情况下，调节每一室内机所对应的膨胀阀开度。
这样，室内机总机负荷所处的室内机总机负荷范围为第二室内机总机负荷范围，说明当前室内机总负荷满足需求，维持室外机运转能力不变。此时通过调节各个室内机的膨胀阀开度来实现冷媒在各个室内机之间的分配，以满足各个室内机的负荷需求。
可选地，调节每一室内机所对应的膨胀阀开度，包括：确定每一室内机所处的温度差范围；基于每一室内机的温度差范围，确定与温度差对应的目标调节策略；根据目标调节策略对室内机的膨胀阀进行调节。
可选地，可以按照如下方法确定与温度差对应的目标调节策略：
(1)在温度差小于第一温差阈值的情况下，确定目标调节策略为减小开度；
(2)在温度差大于或者等于第一温差阈值，且小于第二温差阈值的情况下，确定目标调节策略为维持策略；
(3)在温度差大于或者等于第二温差阈值的情况下，确定目标调节策略为自动调节策略；其中，第一温差阈值小于第二温差阈值。
在本实施例中，温度差较小时，说明室内机负荷需求已经满足，此时可以降低开度，以保证其他内机的效果，即使得更多冷媒流向其他内机。从而实现了节能，且提升了控制效率。如果温度差处于均衡状态，说明当前内机负荷处于均衡状态，无需改变开度值。如果温度差过高，说明温度差对负荷的影响较小，此时需要基于空调的其他参数自动调节膨胀阀。具体地，可以根据室内机盘管温度，过热度等。这样，通过等级控制开度，实现了室内机膨胀阀的精确控制，既节约能源，又防止无效控制，提升控制精度。
具体地，各室内机膨胀阀开度控制的方法可以按照如下方式设定：(用detT表示温 度差)
(1)detT≥阈值2：自动控制，如根据内机盘管温度、过热度等正常控制。
(2)0≤detT<阈值2：膨胀阀开度维持当前值不变。
(3)阈值3≤detT<0：本内机负荷需求已满足，为保证其它内机效果，本内机的膨胀阀开度按照固定值减少，如每1分钟减少5pls。
(4)detT<阈值3：本内机负荷需求已过度满足，加快膨胀阀开度调节。
可选地，上述方法还包括：在温度差小于第一温差阈值的情况下，基于温度差调节开度减小的速度。
可选地，基于温度差调节开度减小的速度，包括：如果室内机的温差小于阈值3，按照第一速度减开度；或者，如果室内机的温差在阈值3与0之间，按照第二速度减小开度；其中，第一速度小于第二速度。
优选地，上述阈值2>0>阈值3。
上述实施例中，在温度差较小的情况下，说明需求基本满足，只需要减小开度即可，而在温度差持续减小时，说明内机负荷已经过渡满足，需要加快减小开度。具体地，第一速度可以是按照固定值减小速度，例如，设定每分钟减小5pls。第二速度可以是按照线性关系减小速度，例如，规定时间(如20秒)减少值downVal＝(rate8*detT+rate9)*PerMAXPLS，且满足downVal<＝PerMAXPLS。PerMAXPLS为内机膨胀阀每次调节的最大开度，如20pls。
结合图8所示，本申请实施例提供一种用于控制多联机空调的装置800，包括处理器(processor)100和存储器(memory)101。可选地，该装置还可以包括通信接口(Communication Interface)102和总线103。其中，处理器100、通信接口102、存储器101可以通过总线103完成相互间的通信。通信接口102可以用于信息传输。处理器100可以调用存储器101中的逻辑指令，以执行上述任一实施例所述的用于控制多联机空调的方法。
此外，上述的存储器101中的逻辑指令可以通过软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。
存储器101作为一种计算机可读存储介质，可用于存储软件程序、计算机可执行程序，如本申请实施例中的方法对应的程序指令/模块。处理器100通过运行存储在存储器101中的程序指令/模块，从而执行功能应用以及数据处理，即实现上述实施例的用于控制多联机空调的方法。
存储器101可包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序；存储数据区可存储根据终端设备的使用所创建的数据等。此 外，存储器101可以包括高速随机存取存储器，还可以包括非易失性存储器。
结合图9所示，为本申请实施例提供的一种多联机空调900，包括：室外机901；与室外机连接的多个室内机902；如图8所示的用于控制多联机空调的装置800，被安装于室外机901或室内机902。这里所表述的安装关系，并不仅限于在多联机空调内部放置，还包括了与多联机空调的其他元器件的安装连接，包括但不限于物理连接、电性连接或者信号传输连接等。本领域技术人员可以理解的是，用于控制多联机空调的装置800可以适配于可行的多联机空调，进而实现其他可行的实施例。
本申请实施例提供了一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令设置为执行上述实施例的用于控制多联机空调的方法。
本申请实施例提供了一种计算机程序产品，所述计算机程序产品包括存储在计算机可读存储介质上的计算机程序，所述计算机程序包括程序指令，当所述程序指令被计算机执行时，使所述计算机执行上述实施例的用于控制多联机空调的方法。
本公开实施例提供了一种计算机程序，当所述计算机程序被计算机执行时，使所述计算机实现上述用于控制多联机空调的方法。
上述的计算机可读存储介质可以是暂态计算机可读存储介质，也可以是非暂态计算机可读存储介质。
本申请实施例的技术方案可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括一个或多个指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请实施例所述方法的全部或部分步骤。而前述的存储介质可以是非暂态存储介质，包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等多种可以存储程序代码的介质，也可以是暂态存储介质。
以上描述和附图充分地示出了本申请的实施例，以使本领域的技术人员能够实践它们。其他实施例可以包括结构的、逻辑的、电气的、过程的以及其他的改变。实施例仅代表可能的变化。除非明确要求，否则单独的部件和功能是可选的，并且操作的顺序可以变化。一些实施例的部分和特征可以被包括在或替换其他实施例的部分和特征。而且，本申请中使用的用词仅用于描述实施例并且不用于限制权利要求。如在实施例以及权利要求的描述中使用的，除非上下文清楚地表明，否则单数形式的“一个”(a)、“一个”(an)和“所述”(the)旨在同样包括复数形式。类似地，如在本申请中所使用的术语“和/或”是指包含一个或一个以上相关联的列出的任何以及所有可能的组合。另外，当用于本申请中时，术语“包括”(comprise)及其变型“包括”(comprises)和/或包括(comprising)等指陈述的特征、 整体、步骤、操作、元素，和/或组件的存在，但不排除一个或一个以上其它特征、整体、步骤、操作、元素、组件和/或这些的分组的存在或添加。在没有更多限制的情况下，由语句“包括一个…”限定的要素，并不排除在包括所述要素的过程、方法或者设备中还存在另外的相同要素。本文中，每个实施例重点说明的可以是与其他实施例的不同之处，各个实施例之间相同相似部分可以互相参见。对于实施例公开的方法、产品等而言，如果其与实施例公开的方法部分相对应，那么相关之处可以参见方法部分的描述。
本领域技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，可以取决于技术方案的特定应用和设计约束条件。所述技术人员可以对每个特定的应用来使用不同方法以实现所描述的功能，但是这种实现不应认为超出本申请实施例的范围。所述技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
本文所披露的实施例中，所揭露的方法、产品(包括但不限于装置、设备等)，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，可以仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例。另外，在本申请实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
附图中的流程图和框图显示了根据本申请实施例的系统、方法和计算机程序产品的可能实现的体系架构、功能和操作。在这点上，流程图或框图中的每个方框可以代表一个模块、程序段或代码的一部分，所述模块、程序段或代码的一部分包含一个或多个用于实现规定的逻辑功能的可执行指令。在有些作为替换的实现中，方框中所标注的功能也可以以不同于附图中所标注的顺序发生。例如，两个连续的方框实际上可以基本并行地执行，它们有时也可以按相反的顺序执行，这可以依所涉及的功能而定。在附图中的流程图和框图所对应的描述中，不同的方框所对应的操作或步骤也可以以不同于描述中所披露的顺序发 生，有时不同的操作或步骤之间不存在特定的顺序。例如，两个连续的操作或步骤实际上可以基本并行地执行，它们有时也可以按相反的顺序执行，这可以依所涉及的功能而定。框图和/或流程图中的每个方框、以及框图和/或流程图中的方框的组合，可以用执行规定的功能或动作的专用的基于硬件的系统来实现，或者可以用专用硬件与计算机指令的组合来实现。

Claims (12)

  1. 一种用于控制多联机空调的方法，其特征在于，多联机空调包括室外机和与室外机连接的多个室内机；方法包括：
    获得每一室内机的实际温度与设定温度之间的温度差；
    确定与每一温度差相对应的室内机单机负荷；
    根据室内机单机负荷确定多联机空调的室内机总机负荷；
    基于室内机总机负荷控制室外机运行。
  2. 根据权利要求1所述的方法，其特征在于，确定与每一温度差相对应的室内机单机负荷，包括：
    确定温度差所处的温度差范围；
    根据温度差所处的温度差范围，确定室内机单机负荷与温度差的目标对应关系；
    基于目标对应关系，确定与每一温度差相对应的室内机单机负荷。
  3. 根据权利要求2所述的方法，其特征在于，根据温度差所处的温度差范围，确定室内机单机负荷与温度差的目标对应关系，包括：
    在温度差所处的温度差范围为第一温度差范围的情况下，确定目标对应关系为二次曲线关系；
    在温度差所处的温度差范围为第二温度差范围的情况下，确定目标对应关系为一次线性关系；
    在温度差所处的温度差范围为第三温度差范围的情况下，确定目标对应关系为定值关系；
    在温度差所处的温度差范围为第四温度差范围的情况下，确定目标对应关系为一次线性关系；
    其中，第一温度差范围的下限阈值大于或等于第二温度差范围的上限阈值，第二温度差范围的下限阈值大于或等于第三温度差范围的上限阈值，第三温度差范围的下限阈值大于或等于第四温度差范围的上限阈值。
  4. 根据权利要求3所述的方法，其特征在于，确定目标对应关系为二次曲线关系，包括：
    根据温差的平方、温差以及室内机能力匹数确定二次函数；
    将二次函数确定为目标对应关系。
  5. 根据权利要求1至4任一项所述的方法，其特征在于，基于室内机总机负荷控制室外机运行，包括：
    确定室内机总机负荷所处的室内机总机负荷范围；
    根据室内机总机负荷所处的室内机总机负荷范围，调节室外机的运转频率。
  6. 根据权利要求5所述的方法，其特征在于，根据室内机总机负荷所处的室内机总机负荷范围，调节室外机的运转频率，包括：
    在室内机总机负荷所处的室内机总机负荷范围为第一室内机总机负荷范围的情况下，提高室外机的运转频率；
    在室内机总机负荷所处的室内机总机负荷范围为第二室内机总机负荷范围的情况下，维持室外机的运转频率；
    在室内机总机负荷所处的室内机总机机负荷范围为第三室内机总负荷范围的情况下，降低室外机的运转频率；其中，第一室内机总机负荷的上限阈值小于或者等于第二室内机总机负荷的下限阈值，第二室内机总机负荷的上限阈值小于或者等于第三室内机总机负荷的下限阈值。
  7. 根据权利要求6所述的方法，其特征在于，第一室内机总负荷的上限阈值等于第二室内机总负荷的下限阈值，且第二室内机总负荷的上限阈值等于第三室内机总负荷的下限阈值。
  8. 根据权利要求6所述的方法，其特征在于，基于室内机总机负荷控制室外机运行，还包括：
    在室内机总机负荷所处的室内机总机负荷范围为第二室内机总机负荷范围的情况下，调节每一室内机所对应的膨胀阀开度。
  9. 一种用于控制多联机空调的装置，包括处理器和存储有程序指令的存储器，其特征在于，所述处理器被配置为在执行所述程序指令时，执行如权利要求1至8任一项所述的用于控制多联机空调的方法。
  10. 一种多联机空调，其特征在于，包括：
    室外机；
    与室外机连接的多个室内机；
    如权利要求9所述的用于控制多联机空调的装置，被安装于室外机或室内机。
  11. 一种计算机程序，当所述计算机程序被计算机执行时，使所述计算机实现如权利要求1至8任一项所述的用于控制多联机空调的方法。
  12. 一种计算机程序产品，所述计算机程序产品包括存储在计算机可读存储介质上的计算机指令，当所述程序指令被计算机执行时，使所述计算机实现如权利要求1至8任一项所述的用于控制多联机空调的方法。
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